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linhaoi
2 năm trước
Để đo chiều cao của một ngọn tháp, không thể trèo lên đỉnh, người ta dùng thước dài, thước đo góc và đèn laser thực hiện thao tác đo thu được kết quả như hình vẽ. Hãy tính chiều cao của tháp (Lưu ý: Kết quả làm tròn đến chữ số thập phân thứ nhất).
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